/*
 * Copyright (c) 2020 Uber Technologies, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *     http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.uber.rss.storage;

import com.uber.rss.common.AppShuffleId;

import java.nio.file.Paths;

/***
 * Utility methods for shuffle files.
 */
public class ShuffleFileUtils {
    public static final int MAX_SPLITS = 10000;

    public static String getShuffleFileName(int shuffleId, int partitionId) {
        return String.format("shuffle_%s_p_%s.data", shuffleId, partitionId);
    }
    
    public static String getShuffleFilePath(String rootDir, 
                                          AppShuffleId appShuffleId,
                                          int partitionId) {
        String fileName = getShuffleFileName(
                appShuffleId.getShuffleId(), partitionId);
        String path = Paths.get(
                getAppShuffleDir(rootDir, appShuffleId.getAppId()), 
                appShuffleId.getAppAttempt(),
                fileName).toString();
        return path;
    }

    public static String getAppShuffleDir(String rootDir, String appId) {
        return Paths.get(rootDir, appId).toString();
    }
}
